The plugin screenshots are very misleading. Basically this slider can only display an image. Those screenshots look like they have images, text, and buttons...but they don't. To get slides like that, you need to upload a picture of text and buttons. The plugin screenshots show there's a post editor like any other blog post or web page, but the slider only uses the featured image. If you add the shortcode for the except, the slider will display a small amount of text in a grey box at the bottom of the image.